Security expert Bob Diachenko, along with Comparitech, has discovered more than 267 million Facebook user IDs, phone numbers and names in an unsecured database. The huge trove of data is likely the result of an illegal scraping operation or Facebook API abuse by a group of hackers in Vietnam. The exposed data could be used by threat actors to conduct large-scale SMS spam and phishing campaigns. "A database containing more than 267 million Facebook user IDs, phone numbers, and names was left exposed on the web for anyone to access without a password or any other authentication." "Comparitech partnered with security researcher Bob Diachenko to uncover the Elasticsearch cluster.